Move navigation menu rendering to trigger from layout, add scaffold.css to layout to fix the random style changes I had last night, change the menu into a drop-down menu
Finish removing all references to _nav.html.erb views, add javascript/stylesheet link generation code, add basic styling to menu
Fix menu layout on pages without tables, provide visual feedback when hovering over all table rows
Add song and album counts to artist index
Remove last reference to render 'nav' in views